4.5" wide, 10 yards long paper rolls with adhesive (PSA or Stikit) backing. C weight paper for 40, 60, 500 and 600 grit, B weight for all other grits. Stearate "No-Load" coating prevents loading and clogging and extends life. Perfect for finishing sanders that require 1/4 or 1/2 sheets of stick-on sandpaper. Fits Porter Cable 505 half-sheet sander as well as others. Easy and quick to attach.